And erwin lavens



2 Sheets -Sh eet 1. H. 0. SWOBOD'A-8GE- LAVENS.

ELECTRIC ARC LAMP.

Patented Jan. 28, 1896.

(No Model.)

I l h "l I Ii kmQ INVEN 0R8 .flmu 0% M dam ANDREW EGRAHANL PNOTG-LITHQWASNING'IQNJ c (No Model.) 2 Sheets-Sheet 2.

H. 0.8WOBODA &- E. LAVENS.

ELECTRIC ARC LAMP. v

No. 553,697. Patented Jan. 28,1896.

WlTNESSES: 4/ am, )NVfENJORS. firm-d 6 ed, a 9 21413013 v THEIR ATTORNEY INDREVIV VBLGRANAM, PHUYOI-LITHQWASHINGYON. U C.

UNITE STATES PATENT OFFICE.

HANS OTTO SIVOBODA, OF NEW YORK, AND ERVVIN LAVENS, OF BROOK- LYN, NEIV YORK, ASSIGNORS TO THE GENERAL INOANDESOENT ARC LIGHT COMPANY, OF NEWV YORK.

ELECTRIC-ARC LAMP.

SPECIFICATION forming part of Letters latent No. 553,697, dated January 28, 1896. Application filed September 6, 1894. Serial No. 522,290. (No model.)

To all whom it may concern:

Be it known that we, HANS OTTO SWOBODA, of the city and county of New York, and ER- WIN LAVENS, of Brooklyn, Kings county, State of New York, have invented a certain new and useful Improvement in Are Electric Lamps, of which the following is a specification.

We will describe a lamp embodying our improvement, and then point out the novel features in the claims.

I11 the accompanying drawings, Figure l is a sectional side elevation of a lamp embody ing ourimprovement Fig. 2 is a side elevation of certain parts of the lamp in normal position. Fig. 3 i s'asimilarviewof the same parts in the position which they occupy during the feeding of the carbon. Fig. 4c is a sectional elevation in a plane at right angles to Fig. 1, certain parts being broken away. Fig. 5 is an inverted plan of certain parts providing for the suspension of the lamp.

Similar letters of reference designate corresponding parts in all the figures.

A designates the frame of the lamp. It may be of any suitable form and construction, and the circuit may be extended either through or alongit in any approved manner. In the present instance this frame comprises a rod (1, which is suspended from a cap 13, the latter being constructed to be secured permanently to any suitable overhead support.

O O designate the upper and lower carbons. In the present instance the lower carbon, O, is secured in an immovable carbonholder D, and the upper carbon, O is secured in a holder D which is movable, for the purpose of feeding this carbon as well. as for establishing the arc.

\Ve have shown the upper carbon holder D as secured to a rod E, which is provided with a toothed rack 6; but any equivalent for this rack-bar maybe used. For instance, a band, chain, or any other flexible material combined with a pulley or pulleys may be employed. \Vhatever the character of this support E shall be the same mechanism may serve to control it.

\Vith the rack c of the bar E engages a pinion E mounted loosely upon a shaft This shaft E forms one of the stretchers or crosspieces of a frame F comprising, as here shown, triangular side pieces as well as suitable cross pieces or stretchers. The shaft E is shown as having its ends shouldered and screw-threaded beyond the shoulders, so as to fit the side pieces of the said frame F and receive outside the side pieces nuts for clamping the side pieces and shaft together. The extremities of the shaft may be provided with conical recesses to receive the ends of conical screws engaging with tapped holes in the side pieces of a frame G and clamped to these side pieces by means of suitable nuts.

The frame G is a fixture in the frame of the lamp, but the frame F rocks upon the axis of the shaft E.

E designates a ratchet-wheel which is affixed to the pinion E and with it is capable of turning loosely upon the shaft E With this ratchet-wheel E engages a pawl E that is mounted upon a gear-wheel E in engagement with the ratchet-wheel by a spring E affixed to the wheel The wheel E is loosely mounted upon the shaft E and is un connected with the pinion E and ratchetwheel E Hence the support E of the upper carbon may be raised without causing any rotation of the gear-wheel E; but when the said supportE is lowered it will cause a rotation of the gear-wheel The gear-wheel engages with a pinion E which is affixed to a shaft E that is journaled in the side pieces of the frame F. Upon the same shaft E is affixed a brake-wheel E This brake-wheel therefore controls the descent of the support E for the upper carbon and consequently the feeding of the upper carbon.

E designates a brake-band fastened at one end to a bracket f extending from one of the side pieces of the frame F and passing thence around the brake-wheel and secured at its other end to a rocking arm 6 extending from a rock-shaft E (Here shown as made in tubular form and mounted upon one of the cross-pieces or stretchers of the frame F.) The rock-shaft E is provided with an arm e which extends down one side of the frame F into a position opposite a stop 9 mounted upon one of the side pieces of the frame G and made, as here shown, in the form of an adjustable screw so that its position may be varied to alter its action upon the rock-shaft it and consequently upon the brake-band E". 'When the frame F is rocked into such position that the arm 0 controlling the brake contacts with the stop 1 of the frame G, then the brake will he released. The movement of the frame F in the reverse direction will move the arm (2 beyond the stop g and allow a spring E to apply the brake again. This spring E in the present instance is made of helical form and is connected at one end with the arm a and at the other with a bracket f secured to one of the side pieces of the frame F.

ii designates an electromagnet mounted in the frame G and eoactin g with an armature 11, which is affixed to the frame F. The movement of this armature toward the poles of the magnet is limited by means of a lateral projection f aflixed to one of the side pieces of the frame F and coacting with a lateral projection g affixed to one of the side pieces of the frame G. Its movement in the other direction may be limited by a lateral projection affixed to the same side piece of the frame G and in such a position that when the frame F moves in a direction to lower the armature away from the magnet the projection f of such. frame will coaet with said projection The armature is provided with a weight 71, which as here shown is made in the form of a nut adjustable upon a screw toward and from the axis of motion of the frame F along a screw 7i extending from a bracket 713 mounted upon the armature ll. Of course there may be any number of weights made in the form of nuts applied to the screw. The weight or weights used will be adjusted to secure the proper conditions in a lamp.

It will be understood that whenever the electromagnet attracts the armature sufficiently, it will rock the frame F so as to cause the release of the brake, so as to permit of the descent of the upper carbon, and that whenever the armature is released the frame F will tilt forward so that the brake will be applied and the carbon-support IE will be raised properly to establish the are.

As in the present example of 0U1lIllp1OYO ment a plain shuntwound electromagnet is contemplated, we have shown a shunt cutout as included in the lamp, but as this forms no part of our invention we do not deem any description of it necessary.

Obviously it will be within. the spirit of our invention to operate both ends of the brake-band instead of one side.

upward flanges Z) 11 which are made in the form of arcs of a circle large enough to inclose the rod (L of the lamp-frame A. In the upper part of the rod a is a cross-pin a. The flanges I) U are so far separated at their ends that this cross-pin a may pass between them. when the rod a is turned into the proper position. In the tops of the flanges I) U are notches b and from these notches to one end of each of the flanges extend plain horizontal surfaces 1)", while from the notches toward the other end of each of the flanges extend inclined surfaces 1), that terminate in upwardly-extending projections or steps I).

It will be readily understood that the rod a may be engaged with the cap 13 by turning the rod a of the lamp-frame to such a position that its cross-pin a will be opposite the space between the flanges Z1 Z1 and then raising the rod until the cross-pin shall have been elevated above the surfaces 0, if afterward the rod shall be rotated so as to bring the ends of the cross-pin a opposite the notches U. To disengage the pin a it will be only necessary to rotate the rod a of the lamp-frame A in the reverse direction until the pin a is brought opposite the space between the flanges 1) l1", whereupon said red (I may be lowered from the cap 13.

\Ve have shown that a hood or reflector n my be attached to the inside of the ring I).

What we claim as our intention, and desire to secure by Letters Patent, is-

1. In an electric lamp, the combination of a movable frame, a brake and brake wheel carried by said movable frame, a rock shaft provided with an arm also carried by said frame, a stop for coacting with said. arm, and an adjustable weight or weights secured to the movable frame, substantially as specified.

2. in. an electric lamp, the combi nation with a rod or tube a, provided with a projection or pin, and the cap 13, of a receptacle provided with a flange or flanges having a notch or notches through which said pin may be passed and subsequently caused to engage with the flange or flanges, substantially as specified.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

HANS OTTO Sll'OllOlLi. ERlVIN LAVENS.

Witnesses;

WM. FRANKSEN, I. WERTHEIMER. 

